Check if value already exists within list of dictionaries?

Question

I\'ve got a Python list of dictionaries, as follows:

a = [
    {\'main_color\': \'red\', \'second_color\':\'blue\'},
    {\'main_color\': \'yellow\', \'secon         


        

Answer 1

Based on @Mark Byers great answer, and following @Florent question, just to indicate that it will also work with 2 conditions on list of dics with more than 2 keys:

names = []
names.append({'first': 'Nil', 'last': 'Elliot', 'suffix': 'III'})
names.append({'first': 'Max', 'last': 'Sam', 'suffix': 'IX'})
names.append({'first': 'Anthony', 'last': 'Mark', 'suffix': 'IX'})

if not any(d['first'] == 'Anthony' and d['last'] == 'Mark' for d in names):

    print('Not exists!')
else:
    print('Exists!')

Result:

Exists!